The Navy says the Portsmouth Naval Shipyard's 4,700 civilian workers due to report to duty Tuesday should do so, regardless of whether government is closed.

KITTERY, Maine (AP) _ Thousands of workers are being told to report to duty Tuesday at Portsmouth Naval Shipyard, even if the federal government shuts down.

In Washington, a budget dispute over President Barack Obama's signature health care law could lead to the first government shutdown in 17 years at midnight.

But the Navy says the shipyard's 4,700 civilian workers due to report to duty Tuesday should do so, regardless of whether government is closed. The Navy is advising workers that they will be told after their arrival Tuesday whether they'll be working or going home.

Elsewhere, Maine's Acadia National Park will close its gates if there's a shutdown.

Navy shipbuilder Bath Iron Works is a private business that wouldn't be immediately impacted.